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Biaxially oriented polyester film for molded part

A molding part, biaxial orientation technology, applied in the direction of synthetic resin layered products, ion implantation plating, coating, etc., can solve the problems of insufficient stress, poor peelability, residual protective film, etc., and achieve the change of film appearance Small size and excellent thermal dimensional stability

Active Publication Date: 2009-05-06
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this proposal, the stress during molding cannot be sufficiently low, so when molding the laminate for molding, the molding followability is not sufficient, and the peelability after molding is not good, so there is a problem in the metal-like easy-to-mold decorative sheet. The problem of fragments of the protective film remaining on the surface of the

Method used

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  • Biaxially oriented polyester film for molded part
  • Biaxially oriented polyester film for molded part
  • Biaxially oriented polyester film for molded part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] A 3-layer laminated film of A layer / B layer / A layer is produced. As the polyester A constituting the layer A, PET, PBT, PETG, and PETM were mixed and used in a mass ratio of 34:25:40:1. As the polyester B constituting the B layer, PET, PBT, PETG, and PETM were mixed and used in a ratio of 34.8:25:40:0.2.

[0169] Each mixed polyester resin was dried in a vacuum dryer at 180°C for 4 hours to fully remove moisture, and then supplied to a single-screw extruder, melted at 280°C, and passed through a filter and a gear pump in a separate path. , remove foreign matter, make the extrusion amount uniform, and then laminate in the feeding module set on the upper part of the T-die according to the method of A layer / B layer / A layer (refer to the table for the thickness of the layer), and then pass the T The mold spit is formed into flakes on a cooling drum whose temperature is controlled at 25°C. At this time, static electricity was applied using a wire electrode having a diamete...

Embodiment 2

[0173] A 3-layer laminated film of A layer / B layer / A layer is produced. As the polyester A constituting the layer A, PET, PETG, and PETM were mixed and used at a mass ratio of 33.4:65:1.6. As the polyester B constituting the B layer, PET, PBT, and PETG were mixed and used at a mass ratio of 45:20:35.

[0174] Except having set the heat-processing temperature at 240 degreeC, it carried out similarly to Example 1, and obtained the biaxially-oriented polyester film with a film thickness of 25 micrometers.

[0175]The obtained biaxially oriented polyester film was excellent in moldability and interlayer adhesion after molding, and also excellent in appearance after metal vapor deposition under the condition of item (10), showing that it can be used as a biaxially oriented polyester film for molded parts. Excellent properties of ester film. In addition, the properties of the protective film evaluated under the condition of item (11) were also good, excellent in moldability, and t...

Embodiment 3

[0177] A two-layer laminated film of layer A / layer B is produced. As the polyester A constituting the layer A, PET, PETG, and PETM were mixed and used at a mass ratio of 37:60:3. As the polyester B constituting the B layer, PET, PBT, and PETG were mixed and used in a mass ratio of 50:15:35.

[0178] Except having set the heat treatment temperature at 238° C., it was carried out in the same manner as in Example 1 to obtain a biaxially oriented polyester film with a film thickness of 25 μm.

[0179] The obtained biaxially oriented polyester film was excellent in moldability and interlayer adhesion after molding. However, since the turbidity was slightly high, the appearance after vapor-depositing the metal under the condition of item (10) looked somewhat cloudy.

[0180] In addition, since the F100 at 150°C is slightly high, the thermoformability as a protective film is affected to some extent, and the glossiness of the molded article after molding is slightly lowered, but a m...

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Abstract

To provide a biaxially oriented polyester film, particularly a biaxially oriented polyester film for forming members which is useful as a substrate in producing metallic forming members by metal vapor deposition or as a surface protective film in the forming of decorative sheets. [MEANS FOR SOLVING PROBLEMS] A biaxially oriented polyester film for forming members, which is an at least two-ply laminate constituted of a layer (A) made of a polyester (A) and a layer (B) made of a polyester (B) wherein the interlaminar strength between the layers (A) and (B) is 5 N / 15mm or above and the stress values (F100 values) at 100% elongation in the lengthwise and widthwise directions at 200 DEG C and 150 DEG C are 1 to 50 MPa.

Description

technical field [0001] The present invention relates to a biaxially oriented polyester film, in particular to a biaxially oriented polyester film for molding parts, which can be applied to metal-like molding parts to be processed after vapor-depositing metal on the film surface, and it can also be applied to decorative Surface protection film during sheet molding, etc. Background technique [0002] In recent years, in building materials, automobile parts, mobile phones, and electrical products, etc., a large number of parts with metal-like appearance obtained by electroplating moldings obtained by resin injection molding, and high decorative properties after coating parts. In addition, as concerns about environmental issues have increased, the effects of the plating solution in the chemical tank when plating resin, and the solvent and carbon dioxide discharged during the coating process on the environment have been regarded as problems. In particular, measures to prevent l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B29C48/08
CPCB29C47/0057B29K2067/003B29C47/364B29C55/023B29C47/0004B29C2947/92647C23C14/0015B29C2947/926B29C47/0021C23C14/20B29C2947/92704B29C2947/92561B29C55/143B29C47/8845B29C45/14827B29C47/065B32B27/36B29K2067/006B29C47/14B29C2948/92704B29C48/022B29C48/08B29C48/0018B29C48/21B29C48/305B29C48/37B29C48/91B29C48/914B29C48/9165B29C2948/92561B29C2948/926B29C2948/92647Y10T156/11Y10T156/1002Y10T428/24802Y10T428/31678Y10T428/31681Y10T428/3179Y10T428/31786B32B15/08
Inventor 真锅功松井良辅木村将弘
Owner TORAY IND INC
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